Hybrid ATV Powertrain Layout Without a Reduction Gearbox
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Solution Overview
Problem
Existing all-terrain vehicles with hybrid drive systems have inefficiencies due to transverse engine arrangements requiring reduction gearboxes, increasing component count and reducing transmission efficiency, and independent electric generator and motor functions that add complexity.
Innovation Solution
A hybrid assembly with a longitudinally arranged engine, automatic shift gearbox, and integrated motor controller, eliminating the need for a reduction gearbox and allowing simultaneous operation of the engine and electric motor for improved efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the engine is arranged transversely and a reduction gearbox is used, then the power transmission is achieved, but the number of components increases and transmission efficiency decreases
Solution Approach 1:
The patent removes the reduction gearbox from the power transmission system by adopting a longitudinal engine arrangement that directly connects to the differential via a clutch assembly. This extraction of the unnecessary reduction gearbox component simplifies the overall structure and improves transmission efficiency while maintaining the required power delivery function.
Solution Approach 2:
Instead of the conventional transverse engine arrangement that requires a reduction gearbox, the patent inverts the approach by arranging the engine longitudinally. This inversion eliminates the need for the reduction gearbox and allows direct power transmission to the differential, thereby reducing component count and improving efficiency.
2Adaptability or versatility
If independent electric generator and motor functions are added, then hybrid drive capability is achieved, but system complexity increases
Solution Approach 1:
The patent implements multi-functionality by enabling the electric motor to serve dual purposes: as a drive motor during acceleration and as a generator during deceleration through regenerative braking. The clutch assembly and control system manage these different operational modes, allowing a single electric motor unit to provide both propulsion and energy recovery functions, thereby reducing overall system complexity while maintaining hybrid drive capability.
Solution Approach 2:
The patent merges the electric motor and generator functions into a single integrated system. The electric motor is connected to the differential through the clutch assembly, which can engage or disengage based on operational requirements. This combining of functions reduces the number of separate components needed and simplifies the control architecture while achieving versatile hybrid drive operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the number of components, enhances transmission efficiency, and improves reliability by enabling the engine and electric motor to work together seamlessly, enhancing the all-terrain vehicle's performance and user experience.
Implementation Method 1
the battery is connected to the hybrid rear axle via the first motor
Implementation Method 2
an engine, a gearbox, a battery, a first motor
Data Source
AI summary
A hybrid assembly is provided, including an engine, a gearbox, a battery, a first motor, a front axle and a hybrid rear axle, where the front axle, the battery, and the hybrid rear axle are arranged sequentially along a first direction, the battery is connected to the hybrid rear axle via the first motor, the engine and the gearbox are arranged between the battery and the hybrid rear axle, and the gearbox is arranged on a side of the engine facing the front axle; the engine is arranged along the first direction, an output end of the engine is connected to the gearbox along the first direction, the gearbox is connected to the front axle via a front transmission shaft arranged along the first direction, and the gearbox is connected to the hybrid rear axle via a rear transmission shaft arranged along the first direction.